/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
   It is considered beerware. Prost. Skol. Cheers or whatever.

   $id$ */

#ifndef OT_SOCKET_H__
#define OT_SOCKET_H__

#include <stdint.h>
#include <sys/types.h>

#include "trackerlogic.h"

/* Every socket opentracker opens is an AF_INET6 socket with IPV6_V6ONLY
   cleared, so one descriptor serves both families and an IPv4 peer arrives
   as the v4 mapped address */

/* Ask the kernel to let several processes bind the same address */
extern int g_socket_reuseport;

/* Create, bind and, for TCP, listen. The returned socket is non blocking
   Returns -1 on failure with errno set */
int     socket_tcp_listen(const ot_ip6 ip, uint16_t port);
int     socket_udp_bind(const ot_ip6 ip, uint16_t port);

int     socket_tcp_connect(const ot_ip6 srcip, uint16_t srcport, const ot_ip6 dstip, uint16_t dstport);
int     socket_is_connected(int s);
int     socket_accept(int s, ot_ip6 ip, uint16_t *port);

ssize_t socket_recv(int s, void *buf, size_t len, ot_ip6 ip, uint16_t *port);
ssize_t socket_send(int s, const void *buf, size_t len, const ot_ip6 ip, uint16_t port);

#ifdef WANT_SYNC_LIVE
/*
   socket_mcast_join takes the wildcard address and names the interface in the
   join, and hands back a blocking socket, since the thread that reads it does
   nothing else. socket_mcast_bind hands back a non blocking one, because the
   thread that sends from it is also serving clients. Incoming datagrams are
   read with socket_recv */
int     socket_mcast_join(const ot_ip6 group, const ot_ip6 interface, uint16_t port);
int     socket_mcast_bind(const ot_ip6 interface, uint16_t port, int loopback);
ssize_t socket_mcast_send(int s, const void *buf, size_t len, const ot_ip6 group, uint16_t port);
#endif

#endif